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Holley Cathedral Lo-Ram for boost...

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Old Jul 31, 2020 | 08:03 PM
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Default Holley Cathedral Lo-Ram for boost...

How cool is it that Holley released their new intake for the Cathedral heads?

105mm throttle body ready, dual injectors/rails, burst panel... looks like it will fit under the cowl of a 4th gen.

l what do you think of this new hotness from Holley?
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Old Jul 31, 2020 | 08:13 PM
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The 300-621 front feed will clear an fbody cowl per their spec sheet.
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Old Jul 31, 2020 | 08:26 PM
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Has anyone seen any testing of these?
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Old Jul 31, 2020 | 08:37 PM
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Originally Posted by jayyyw
Has anyone seen any testing of these?
Didn't it come out super recently, like today?

Only testing would be by the manufacturer or their close contants... take such "tests" with a grain of salt.
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Old Jul 31, 2020 | 09:26 PM
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The 2 versions of the "low ram" have been out for a few months.
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Old Aug 4, 2020 | 06:11 PM
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Visually it looks nice. Functionally it looks ******* awful.
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Old Aug 4, 2020 | 06:47 PM
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Only reason I see to run it would be for hood clearance if your going to use the in intake intercooler. Other then that it would kill your out of boost hp/torque and not gain much at all over other good intakes in boost. Or that is my take on it anyway.
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Old Aug 4, 2020 | 07:23 PM
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I do love the dual injector option they just came out with. If they had it on the high ram I'd have to buy one.
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Im hoping they will come out with an L92/LS3 port version of this. I have two Edelbrock 2650 head units I have on Magnusson lower tubs making a super cheap non-intercooler blower setup that fits under any hood almost. One is cathedral and one is L92/LS3 headed. The LS3 headed one is twin charged and it spiked boost making 28 lbs a few times, then a few days later I was running my normal 20-22 lbs and blew out the bottom of the tub. I think these manifolds would be much stronger and I like the runners instead of just a big open plenum where the ic sits on the kits. The Magnusson manifolds are very thin on the bottom.


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Old Aug 6, 2020 | 03:32 PM
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pretty big backfire or something cause that ?
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